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Optimize GlobalSurfaceAtlasPass by ignoring GBuffer2 properties (diffuse-only surfaces)

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Wojtek Figat
2024-07-08 16:40:59 +02:00
parent ae2b3d361e
commit 082a5819cd
3 changed files with 14 additions and 25 deletions
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15
Source/Shaders/GI/GlobalSurfaceAtlas.shader
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@@ -107,8 +107,14 @@ float4 PS_Lighting(AtlasVertexOutput input) : SV_Target
float2 atlasUV = input.TileUV * tile.AtlasRectUV.zw + tile.AtlasRectUV.xy;
// Load GBuffer sample from atlas
GBufferData gBufferData = (GBufferData)0;
GBufferSample gBuffer = SampleGBuffer(gBufferData, atlasUV);
float4 gBuffer0 = SAMPLE_RT(GBuffer0, atlasUV);
float4 gBuffer1 = SAMPLE_RT(GBuffer1, atlasUV);
GBufferSample gBuffer = (GBufferSample)0;
gBuffer.Normal = DecodeNormal(gBuffer1.rgb);
gBuffer.ShadingModel = (int)(gBuffer1.a * 3.999);
gBuffer.Color = gBuffer0.rgb;
gBuffer.Roughness = 1.0f;
gBuffer.AO = gBuffer0.a;
BRANCH
if (gBuffer.ShadingModel == SHADING_MODEL_UNLIT)
{
@@ -119,11 +125,6 @@ float4 PS_Lighting(AtlasVertexOutput input) : SV_Target
// Reconstruct world-space position manually (from uv+depth within a tile)
float tileDepth = SampleZ(atlasUV);
//float tileNear = -GLOBAL_SURFACE_ATLAS_TILE_PROJ_PLANE_OFFSET;
//float tileFar = tile.ViewBoundsSize.z + 2 * GLOBAL_SURFACE_ATLAS_TILE_PROJ_PLANE_OFFSET;
//gBufferData.ViewInfo.zw = float2(tileFar / (tileFar - tileNear), (-tileFar * tileNear) / (tileFar - tileNear) / tileFar);
//gBufferData.ViewInfo.zw = float2(1, 0);
//float tileLinearDepth = LinearizeZ(gBufferData, tileDepth);
float3 tileSpacePos = float3(input.TileUV.x - 0.5f, 0.5f - input.TileUV.y, tileDepth);
float3 gBufferTilePos = tileSpacePos * tile.ViewBoundsSize;
float4x4 tileLocalToWorld = Inverse(tile.WorldToLocal);